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Kernel: Implement syscall entry for x86_64

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Gunnar Beutner 2021-06-28 20:57:44 +02:00 committed by Andreas Kling
parent 732dc72c58
commit b6435372cc
Notes: sideshowbarker 2024-07-18 11:22:27 +09:00 
Author: https://github.com/gunnarbeutner
Commit: https://github.com/SerenityOS/serenity/commit/b6435372cc9
Pull-request: https://github.com/SerenityOS/serenity/pull/8301
1 changed files with 27 additions and 2 deletions
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29
Kernel/Syscall.cpp
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@ -55,8 +55,33 @@ NEVER_INLINE void syscall_asm_entry_dummy()
asm(
".globl syscall_asm_entry\n"
"syscall_asm_entry:\n"
" cli\n"
" hlt\n");
" pushq $0x0\n"
" pushq %r15\n"
" pushq %r14\n"
" pushq %r13\n"
" pushq %r12\n"
" pushq %r11\n"
" pushq %r10\n"
" pushq %r9\n"
" pushq %r8\n"
" pushq %rax\n"
" pushq %rcx\n"
" pushq %rdx\n"
" pushq %rbx\n"
" pushq %rsp\n"
" pushq %rbp\n"
" pushq %rsi\n"
" pushq %rdi\n"
" pushq %rsp \n" /* set TrapFrame::regs */
" subq $" __STRINGIFY(TRAP_FRAME_SIZE - 8) ", %rsp \n"
" subq $0x8, %rsp\n" /* align stack */
" lea 0x8(%rsp), %rdi \n"
" cld\n"
" call enter_trap_no_irq \n"
" lea 0x8(%rsp), %rdi \n"
" call syscall_handler\n"
" addq $0x8, %rsp\n" /* undo alignment */
" jmp common_trap_exit \n");
#endif
// clang-format on
}